1. B.C.H. Steel, in: Proceedings of the International Symposium on SOFCs, Nagoya, 1989, p. 142.
2. H. Yokoyama, et al., Proc. Solid Oxide Fuel Cell 5 (1997) 99.
3. S.C. Singhal, Proc. Solid Oxide Fuel Cell 6 (1999) 4145.
4. J.R. Selman, in: L.J.M.J. Blomen, N.M. Mugerwa (Eds.), Fuel Cell Systems, Plenum Press, New York, 1993, pp. 360–361.